The South Fork Obion Watershed covers an area of approximately 1,200 square miles and is located in western Tennessee. The watershed is primarily rural, with agriculture being the dominant land use. The hydrology of the watershed is dominated by the South Fork Obion River, which is a major tributary of the Obion River. The watershed experiences a humid subtropical climate, with hot summers and mild winters. Snowfall is relatively rare, with an average of around 3 inches per year. Surface water in the watershed is used for irrigation, recreation, and drinking water supply. Reservoirs in the watershed contain constituents such as sediment, nutrients, and pollutants. Interesting climatic trends in the watershed include an increase in average temperatures and more frequent occurrences of extreme weather events such as heavy rainfall and drought.